| 1 | /*
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| 2 | * Copyright (c) 2009 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup inputgen generic
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| 30 | * @brief Generic scancode parser.
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| 31 | * @ingroup input
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| 32 | * @{
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| 33 | */
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| 34 | /** @file
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| 35 | */
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| 36 |
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| 37 | #ifndef KBD_GSP_H_
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| 38 | #define KBD_GSP_H_
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| 39 |
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| 40 | #include <adt/hash_table.h>
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| 41 |
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| 42 | enum {
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| 43 | GSP_END = -1, /**< Terminates a sequence. */
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| 44 | GSP_DEFAULT = -2 /**< Wildcard, catches unhandled cases. */
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| 45 | };
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| 46 |
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| 47 | /** Scancode parser description */
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| 48 | typedef struct {
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| 49 | /** Transition table, (state, input) -> (state, output) */
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| 50 | hash_table_t trans;
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| 51 |
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| 52 | /** Number of states */
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| 53 | int states;
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| 54 | } gsp_t;
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| 55 |
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| 56 | /** Scancode parser transition. */
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| 57 | typedef struct {
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| 58 | ht_link_t link; /**< Link to hash table in @c gsp_t */
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| 59 |
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| 60 | /* Preconditions */
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| 61 |
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| 62 | int old_state; /**< State before transition */
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| 63 | int input; /**< Input symbol (scancode) */
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| 64 |
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| 65 | /* Effects */
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| 66 |
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| 67 | int new_state; /**< State after transition */
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| 68 |
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| 69 | /* Output emitted during transition */
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| 70 |
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| 71 | unsigned out_mods; /**< Modifier to emit */
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| 72 | unsigned out_key; /**< Keycode to emit */
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| 73 | } gsp_trans_t;
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| 74 |
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| 75 | extern void gsp_init(gsp_t *);
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| 76 | extern int gsp_insert_defs(gsp_t *, const int *);
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| 77 | extern int gsp_insert_seq(gsp_t *, const int *, unsigned, unsigned);
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| 78 | extern int gsp_step(gsp_t *, int, int, unsigned *, unsigned *);
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| 79 |
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| 80 | #endif
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| 81 |
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| 82 | /**
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| 83 | * @}
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| 84 | */
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